#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>
#include<queue>
#include<vector>
using namespace std;
int n;
char aa[105],bb[105];
int pp(char a,char b)
{
    if(a=='A' && b=='U')    return 1;
    if(a=='T' && b=='A')    return 1;
    if(a=='C' && b=='G')    return 1;
    if(a=='G' && b=='C')    return 1;
    return 0;
}
int main()
{
    int t;
    cin>>t;
    while(t--) 
    {
        int flag=0;
        cin>>n;
        cin>>aa>>bb;
        for(int i=0;i<n;i++)
        {
            if(pp(aa[i],bb[i])==0)
            {
                cout<<"NO"<<endl;
                flag=1;
                break;
            }
        }
        if(flag==0)
            cout<<"YES"<<endl;
    }
    return 0; 
}